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Date:- 14 April, 2011
Data Sheet Issue:- A1
Provisional Data
IGBT Gate Driver
Type C0044BG400
Special Features
• High reliability topology
• Separate gate interface card for optimal packaging
• Designed for ultra low power consumption
• Balanced supply current in ON and OFF mode
• Build in DC/DC-converter with soft start
• Integrated input filter for low EMI
• Separate low impedance path for parasitic EMI currents
• PD-Voltage levels available up to 7kV
• Low impedance from gate to emitter at start-up and power fail
• Monitoring of all secondary supply voltages
• Monitoring of IGBT switching status (VCE-desat detection)
• Soft switch-OFF at VCE-desat fault condition
• Fibre-optic links for switching commands and status control
• Low light protection for input signal
• Short-pulse suppression, configurable
• Balanced propagation delay time
• Gate Current up to 44A
• Optional gate-speed-up capacitors
Absolute Maximum Ratings
Vs
Iout peak
Iin peak
Iav
Vpd
dv/dt
Rg on
Rg off
Top
Tstg
Ratings
Supply voltage primary
Gate- ON current (theoretical)
Gate- OFF current (theoretical)
Average gate current
Partial discharge voltage
Slew rate4
minimal Ron
minimal Roff
Operating temperature
Storage temperature
Maximum limits
18
44
-68
>100 (tbd.)
min. 2.5 (up to 7 on request)
tbd., >50
0.75
0.75
-20 to +55
-20 to +55
Units
V
A
A
mA
kV
kV/µs
°C
°C
Provisional Data Sheet Type C0044BG400 Issue A1
Page 1 of 6
April, 2011

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WESTCODE An IXYS Company
Characteristics
Vs
Is0
Vgon
Vgoff
Vce desat
PWG +15
PWB +15
PWG +5
PWB +5
PWG -15
PWB -15
PWG +50
PWB +50
Td
Ts
Rs
Cc
Burst susceptibility
Parameter
Supply voltage primary
Supply current without load
Gate-On voltage
Gate-Off voltage
Collector-Emitter-threshold voltage
Power Good Monitor +15V supply secondary
Power Bad Signal +15V supply secondary
Power Good Monitor +5V supply secondary
Power Bad Signal +5V supply secondary
Power Good Monitor -15V supply secondary
Power Bad Signal -15V supply secondary
Power Good Monitor +50V supply secondary
Power Bad Signal +50V supply secondary
propagation-delay time (Ton=Toff)
Soft-switch-off time
Passive short circuit gate resistor
Coupling capacitance primary-secondary
Conducted noise immunity (burst)
IGBT Gate Driver Type C0044BG400
min.
14.4
+11.5
-15.8
20
typ.
15
70
+15
-15
25
14.2
12.0
4.8
4.5
-13.7
-12.6
+44.5
+36.5
1.4
30
20
16
>4
max.
15.6
+15.8
-11.5
20
Units
V
mA
V
V
V
V
V
V
V
V
V
V
V
µs
µs
K
pF
kV
Provisional Data Sheet Type C0044BG400 Issue A1
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April, 2011

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WESTCODE An IXYS Company
IGBT Gate Driver Type C0044BG400
Functional Description
Start up behavior
An un-powered gate driver applies impedance to the gate–emitter connection as follows:
- Permanent 20kpassive resistance (plus possible 20kparallel on “IGBT Interface Board”)
- Low impedance by discharged supply capacitors and main amplifier freewheeling diodes.
- Separate MOSFET that clamps gate output to minus supply voltage as soon as the difference from positive
supply to negative supply exceeds 3V during power up sequence until “Power Good” is valid.
This way the gate–emitter output is kept in OFF status during power up and power down sequence of the primary side
driver supply. (See Figure 1)
Figure 1: Typical start up sequence
Ch1: Gate voltage at power up condition
Fig 2: Internal PWM signal generation at the output of
special circuit. Optical transmitter driven with sinusoidal
current
Ch1: Weak PWM signal direct at optical receiver (RX) output
Ch2: Recovered PWM ON command (driver internal)
Short Pulse Suppression – Low Light Protection
The optical Receiver (RX) type “versatile Link family ” HFBR-2521 (5M-Baud) is followed by a special circuit that not
only ignores short ON or OFF commands, but also filters low light condition in order not to destroy driver or IGBT
(within a t.b.d. range of the signal weakness). Propagation delay time for ON and OFF command is adjusted
separately and well balanced to typical 1.4µsec at good optical signal quality. Depending on low light condition this
delay may increase but will end up in one defined PWM command.
(See Figure .2)
Please note that all optical PWM commands will be symmetrically delayed by this circuit, expressed in the driver
propagation delay time.
Vce-desat Detection
The switching status of the IGBT is monitored by a current source. The VCE-desat trip level is adjustable over a wide
range and adjusted to 25VCE, typically. Propagation delay OFF time is typically 0,3-0,5 µsec (depending on dv/dt of
IGBT switching). The current source is designed to typ. 9 mA, trip level is set to < 6 mA. (Figures 3 and 4). A wide
range of other levels/currents are available on request.
Figure 3: Switch ON command
Ch1: Gate voltage at 300nF simulated gate
Ch2: Collector- emitter voltage
Ch3: Internal VCE0 signal: Detection of IGBT ON status
Figure 4: Switch OFF command
Ch1: Gate voltage at 300nF simulated gate
Ch2: Collector- emitter voltage
Ch3: Internal VCE0 signal: Detection of IGBT OFF status
Provisional Data Sheet Type C0044BG400 Issue A1
Page 3 of 6
April, 2011